1966. John Wear in a helicopter that hovers next to the top of a tall Douglas-fir tree while a branchlet is clipped with the newly developed tree pruner to sample foliage.
John Wear in a helicopter that hovers next to the top of a tall Douglas-fir tree while a branchlet is clipped with the newly developed tree pruner to sample foliage.
Abstract:
A new technique for sampling tops of tall Douglas-fir trees by using a special pole pruner from a helicopter has been developed and field tested. The pole pruner cuts and holds a branchlet. Foliage samples collected will be compared by spectral analysis to show the type of aerial imagery that best differentiates healthy trees from those attacked by root rot.
From: Wear, John F.; Winterfeld, Robert G. 1966. Sampling tree tops by helicopter...special pole pruner cuts branchlets. Res. Note PSW-RN-131. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 6 p.
For more see: www.fs.usda.gov/treesearch/pubs/37896
Photo by: Unknown
Date: 1966
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.
Source: FHP slide collection. Regional Office; Portland, Oregon.
Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth
1966. John Wear in a helicopter that hovers next to the top of a tall Douglas-fir tree while a branchlet is clipped with the newly developed tree pruner to sample foliage.
John Wear in a helicopter that hovers next to the top of a tall Douglas-fir tree while a branchlet is clipped with the newly developed tree pruner to sample foliage.
Abstract:
A new technique for sampling tops of tall Douglas-fir trees by using a special pole pruner from a helicopter has been developed and field tested. The pole pruner cuts and holds a branchlet. Foliage samples collected will be compared by spectral analysis to show the type of aerial imagery that best differentiates healthy trees from those attacked by root rot.
From: Wear, John F.; Winterfeld, Robert G. 1966. Sampling tree tops by helicopter...special pole pruner cuts branchlets. Res. Note PSW-RN-131. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 6 p.
For more see: www.fs.usda.gov/treesearch/pubs/37896
Photo by: Unknown
Date: 1966
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.
Source: FHP slide collection. Regional Office; Portland, Oregon.
Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth